Improvement in evaporators for brine



R. G. LECKIE.

Improvement in Evaporators for Brine.

Patented Jan. 30, 1872.

#1297, flan-di otherwise led into it by a pipe, f.

UNITED STATES PATENT ROBERT G. LEGKIE, OF ACTON VALE, CANADA.

IMPROVEMENT IN EVAPORATORS FOR BRINE.

SPECIFICATION. To all whom it may concern:

Be it known that I, ROBERT GILMoUR LEoKIE, of the Village of Acton Vale, in the county of Bagot, in the Province of Quebec, Canada, have invented new and useful Improvements on Evaporators, and I do hereby declare that the following is a full, clear, and exact description of the construction and op eration of the same, reference being had to the annexed drawing, where- Figure 1 represents a plan of the evaporator. Fig. 2 represents a part sectional and part ele vational view of the evaporator. Fig. 3 represents an end elevation of evaporator. Fig. 4

represents a plan of evaporating-pan.

This invention has reference toimprovements on evaporators, particularly those used for the manufacture of salt, for enabling them more eifectually to utilize the heat, and for rendering more easy and. certain the purification of the brine and the precipitation of the foreign substances contained therein.

In the drawing similar letters of reference indicate like parts.

Letter to is a furnace of any ordinary construction, with either one or two fire doors, as shown in Fig. 3, fire-bars, 850., 850., complete. Through the opening of the ash-pit, and runnin g back underneath the grate, pass two pipes, 12 b, for the admission of atmospheric air, which is highly heated by passingthence throughpipes c c, arched over the fire, as shownin Figs. 2 and 3. From this the heated air is conveyed by a pipe, 0, to a pipe, d, running lengthwise of an evaporating-pan, c, any convenient number of pipes d, perforated on the under side, branching out at right angles to d. This evaporating-pan e is preferably of the configuration shown in the drawing, and being rendered steam-tight by a cover, 6, as shown. A tank, f, of any suitable size, is placed where indicated for the reception of the natural brine, which is pumped or The brine in this tank is slightly heated by the steam generated in the pan 6, which passes through pipes 9 led through the tank. The brine is then conveyedfrom the tank f into the evaporating-pan e by the pipe g, which extends the whole breadth of the pan 6, and is perforated on its lower side so as to feed the brine somewhat in the same way as would be done by a rose. From the lower end of the pan 0 a pipe or conduit, h, leads to a trough, i, which communicates at its further end by pipes 70 7:, respectively, with a reservoir, l, and anevaporating-pan m. Thetrough t is divided into sections by diaphragms z" of about three-fourths of the height of the sides of the trough. A discharge-pipe, n, is used to draw 0E the mother-liquor. The whole of the pipes mentioned may be furnished with stopoocks to control and regulate the flowof brine. The flue 0 from the furnace, passing under the pan on and reservoir l on its Way to the chimney p, imparts to them the necessary heat, the bottom of the pan forming the top of the line. The whole may be inclosed with brick-work, as shown at q, Fig. 2. I

The manner of operating my invention is as follows: The natural brine is fed through the pipe f into the tank f, and is there partially warmed by the action of the steam generated in the evaporatingpan e, which, being prevented from escaping in any other way by the cover 6, passes through and heats the pipes g, the slight inclination in their position preventing any water that may arise from condensation from falling back into the pan 0. The brine is then conducted for treatment to the evaporating-pan e, pouring into it through the perforations in the under side of the pipe g, and is in this vessel brought to the point of saturation, the heated air supplied through the perforated pipes d keeping the brine in the bottom of the vessel in a constant state of ebullition, and preventing the deposit of any incrustation. From the pan 0 the saturated brine passes by the pipe lb into the settling-trough i, where the sulphate of lime or other impurities held in mechanical suspension are deposited. The diaphragms i, retarding the flow of the brine, assist in this operation. From thetrough i the brine may be either conveyed into the reservoir l, and thence into the evaporating-pan m, or directly into the pan m, in which the salt crystals are deposited; the supernatant liquor being drawn 011' when necessary, and the crystals are raked out in the usual way. The pans m and e, forming the tops of the furnace and flue, may have a steam-space underneath, to which steam may be supplied from any suitable generator. In some cases the saturated 2. The combination of the settling-trough i with diaphragms i, evaporating-pan e, reservoir l, and evaporating-pan m and flue 0, substantially as and for the purpose set forth.

3. The settling-trough iwith diaphragms i, substantially as and for the purposeset forth.

4. The perforated pipe g, in combination with evaporating-pan e, substantially as andfor the purpose set forth.

Montreal, 8th day of December, A. D. 1871.

ROBERT GILMOUR LEOKIE.

Witnesses:

CHARLES G. O. SIMPSON. JAS. HY. REYNOLDS. 

